The Knowledge: what's on this weekend

CELEB-WATCHING

Lady Gaga.
Lady Gaga will celebrate the launch of her new perfume at Harrods. Credit: Mario Anzuoni, Reuters

Lady Gaga will make a personal appearance at Harrods on Sunday to celebrate the launch of her new perfume. The pop star will make her red carpet arrival at 7:30pm.

FILM

"Sparkle", the last movie filmed by Whitney Houston before she died, opens in UK cinemas tonight. It is dedicated to her memory, and also stars American Idol winner Jordin Sparks and singer-songwriter CeeLo Green.

The film is a remake of a 1976 movie of the same name, about three sisters who form a girl group and soon become a singing sensation. But can their family survive their new-found fame?

SONY PICTURES

MUSIC

Cheryl Cole.
Cheryl Cole's arena tour comes to London this weekend. Credit: Reuters, Christian Hartmann.

Cheryl Cole's "A Million Lights" arena tour hits London on Sunday. She'll be performing at the O2, supported by Tinchy Stryder.

ARTS

The Rain Room at the Barbican.
The Rain Room gives art-lovers the power to control the rain. Credit: Dominic Lipinksi, PA

A new installation at the Barbican gives visitors the power to control the rain.

When people step into The Rain Room, the water stops overhead, but continues to pound down around them. Wherever they move within the torrent, the water above them mysteriously stops falling.

Admission is free.

MAGIC

Magician David Blaine performs a demonstration of his upcoming performance "Electrified" during a press briefing in New York.
Magician David Blaine performs a demonstration of his upcoming performance "Electrified" during a press briefing in New York. Credit: Mike Segar, Reuters

Magician David Blaine will perform his latest stunt this weekend - one which will reportedly see a million volts of electricity being pumped into him.

"Electrified" is taking place in New York, but Londoners are being invited to chat to Blaine via an interactive station at the Old Truman Brewery. The trans-Atlantic technology even allows them to control the voltage of the electricity coursing through him.